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UC2707 Fiches technique(PDF) 4 Page - Texas Instruments |
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UC2707 Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 8 page 4 UC1707 UC2707 UC3707 The input zener may be used to clamp input signal voltages higher than 5V as long as the zener current is limited to 10mA max. External pull-up resistors are not required. SIMPLIFIED INTERNAL CIRCUITRY Figure 1. Typical digital input gate. Figure 3. Latch disable. The Shutdown latch is disabled when pin 3 is open. An im- pedance of 4k or less from pin 3 to ground will allow a shut- down signal to set the latch which can then be reset by either recycling the VIN supply or by momentarily (>200ns) raising pin 3 high. The input common-mode voltage range is from ground to (VIN-3V). When not used both inputs shoul1d be grounded. Activate time is a function of overdrive with a typical value of 180ns. Pin 7 serves both as a comparator output and as a common digital shutdown input. A high signal here will accomplish the fastest turn off of both outputs. Note that "OFF" is defined as the outputs low. Pulling shutdown low defeats the latch operation regardless of its status. Figure 2. Typical digital input gate. |
Numéro de pièce similaire - UC2707 |
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Description similaire - UC2707 |
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